ATI RN
Nervous System Multiple Choice Questions and Answers Questions
Question 1 of 5
An electrical potential difference across the plasma membrane of a neuron is known as a(n)
Correct Answer: C
Rationale: The resting membrane potential (~-70 mV) is the voltage difference across a neuron’s membrane at rest, due to ion gradients. Action and graded potentials are dynamic, and electrochemical is a broader term.
Question 2 of 5
The nucleus of a neuron is associated with the of the neuron.
Correct Answer: B
Rationale: The nucleus resides in the cell body (soma), which integrates signals and maintains neuron function. Axons transmit, dendrites receive, and myelin sheaths insulate.
Question 3 of 5
Identify a classification of neurons by structure.
Correct Answer: C
Rationale: Unipolar neuron is a structural classification (one process). Interneuron, motor, and sensory are functional types.
Question 4 of 5
Nerve signal transmission over myelinated axons is called
Correct Answer: A
Rationale: Saltatory conduction is impulse jumping between nodes of Ranvier on myelinated axons, speeding transmission.
Question 5 of 5
The spinal cord begins outside the and ends at the
Correct Answer: B
Rationale: The spinal cord begins at the foramen magnum (skull base) and ends at L1-L2 (conus medullaris), not sacrum or L4.